Hacoversine

Compute the half-value coversed sine.

The half-value coversed sine is defined as

h a c o v e r s i n left-parenthesis theta right-parenthesis equals StartFraction 1 minus sine theta Over 2 EndFraction

Usage

var hacoversin = require( '@stdlib/math/base/special/hacoversin' );

hacoversin( x )

Computes the half-value coversed sine (in radians).

var v = hacoversin( 0.0 );
// returns 0.5

v = hacoversin( Math.PI/2.0 );
// returns 0.0

v = hacoversin( -Math.PI/6.0 );
// returns 0.75

Examples

var linspace = require( '@stdlib/math/utils/linspace' );
var hacoversin = require( '@stdlib/math/base/special/hacoversin' );

var x = linspace( 0.0, 2.0*Math.PI, 100 );
var i;

for ( i = 0; i < x.length; i++ ) {
    console.log( hacoversin( x[ i ] ) );
}